Synthesis and photophysical properties of a 2,2′-bianthracene-based receptor bearing two aza-15-crown-5 ethers for naked-eye detection of barium ion |
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Authors: | Shin-ichi Kondo Takuya TakahashiYuji Takiguchi Masafumi Unno |
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Affiliation: | a Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, Yamagata 990-8560, Japan b Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan |
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Abstract: | As a novel chromofluorophore, 9,9′-dimethyl-2,2′-bianthracene 3 has been successfully synthesized by reductive coupling of 2-chloro-9-methylanthracene. Absorbance and fluorescence maxima of 3 can be shifted to visible-region comparing to the former 2,2′-binaphthyl-based receptors. Receptor 2 bearing aza-15-crown-5 moieties via methylene spacer provides selective UV-vis and fluorescence responses for Ba2+ due to the restriction of the conformational change through the formation of an intramolecular sandwich-complex by two azacrown ethers, resulting in the presence of Ba2+ that can be detected by naked eye in aqueous acetonitrile. |
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Keywords: | 2,2&prime -Bianthracene Fluorescence sensor UV-vis spectroscopy Barium detection |
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